Dell
Dell PowerEdge R910 Technical Guide 23
Table 7. Acoustical Performance
105W Configuration @ 23±2°C Ambient
4 x Intel
®
Xeon
®
E7540
(105W)
130W Configuration @ 23±2°C Ambient
4 x Intel
®
Xeon
®
E7540
(130W)
Definitions
Standby: AC Power is connected to power supplies but the system is not turned on.
Idle: Reference ISO7779 (2010) definition 3.1.7; system is running in its OS but no other specific
activity.
Stressed Processor: An operating mode per ISO7779 (2010) definition 3.1.6. The software
SPECPower_ssj2008 is utilized to stress the processors. SPECPower is set to 50% loading.
LwA–UL: The upper limit sound power level (LwA) calculated per section 4.4.2 of ISO 9296 (1988) and
measured in accordance to ISO 7779 (2010).
LpA: Average bystander A-Weighted sound pressure level. The system is placed in a rack with its
bottom at 25 cm from the floor. The acoustic transducers are at the four bystander positions, ref
ISO7779 (2010) Section 8.6.2.
Prominent tones: Criteria of D.6 and D.11 of ECMA-74 11th ed. (2010) are followed to determine if
discrete tones are prominent. The system is placed in a rack with its bottom at 75-cm from the floor.
The acoustic transducer is at front bystander position, ref ISO7779 3rd (2010), Section 8.6.2.
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